$3a-6b+3-7a+10$

$\int_2^{\infty}\left(\frac{1}{x\sqrt{2+x^2}}\right)dx$

$\log\left(3x^2+1\right)-\log\left(3+x\right)=\log\left(3x-2\right)$

$\left(2.9\right)^2-6\left(2.9\right)+8$

$3m^7-2f^5+a+-4f^5-a-3a-9m^7$

$f\left(x\right)=3x^2+5x$

$\left(ax+y-b\right)\left(bx+ay+3\right)$